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Cheap flights from Incheon Intl Airport to Illinois from $355

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Incheon Intl Airport to Illinois departing on 10/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Incheon Intl Airport to Illinois

Cheap round-trip flights

American Airlines Logo
5:45 pm - 11:42 pmICN-ORD
19h 57m1 stop
American Airlines Logo
5:00 am - 3:55 pmORD-ICN
20h 55m1 stop
$587American Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
Logo
8:35 pm - 12:06 amICN-ORD
17h 31m1 stop
Logo
8:00 am - 6:35 pmORD-ICN
20h 35m1 stop
$667
Find Deal
Sat, Oct 25 - Sat, Nov 1
Air Canada Logo
6:00 pm - 7:57 pmICN-STL
39h 57m1 stop
Air Canada Logo
4:05 pm - 4:15 pmSTL-ICN
34h 10m2 stops
$669Air Canada
Find Deal
Wed, Oct 8 - Wed, Oct 15
Air Canada Logo
6:00 pm - 3:18 pmICN-STL
35h 18m2 stops
Air Canada Logo
4:05 pm - 4:15 pmSTL-ICN
34h 10m2 stops
$730Air Canada
Find Deal
Wed, Oct 8 - Wed, Oct 15
Delta Logo
6:00 pm - 9:04 amICN-STL
30h 04m1 stop
Delta Logo
7:30 am - 4:20 pmSTL-ICN
17h 50m1 stop
$794Delta
Find Deal
Thu, Feb 12 - Mon, Feb 16
Delta Logo
6:00 pm - 6:04 pmICN-STL
39h 04m1 stop
Delta Logo
6:30 am - 3:30 pmSTL-ICN
18h 00m1 stop
$795Delta
Find Deal
Fri, Feb 13 - Mon, Feb 16
United Airlines Logo
12:45 pm - 9:16 pmICN-MLI
23h 31m2 stops
United Airlines Logo
8:46 am - 5:40 amMLI-ICN
29h 54m2 stops
$973United Airlines
Find Deal
Fri, Feb 6 - Tue, Feb 10
United Airlines Logo
12:45 pm - 9:36 pmICN-MLI
23h 51m2 stops
United Airlines Logo
10:47 am - 5:40 amMLI-ICN
27h 53m2 stops
$975United Airlines
Find Deal
Fri, Feb 6 - Tue, Feb 10
Korean Air Logo
10:15 am - 12:28 pmICN-MDW
16h 13m1 stop
Korean Air Logo
9:20 am - 5:20 pmMDW-ICN
18h 00m1 stop
$1,346Korean Air
Find Deal
Tue, Sep 23 - Tue, Oct 21
Korean Air Logo
10:15 am - 12:28 pmICN-MDW
16h 13m1 stop
Korean Air Logo
9:20 am - 5:20 pmMDW-ICN
18h 00m1 stop
$1,402Korean Air
Find Deal
Mon, Oct 6 - Mon, Oct 13

Air Canada flights from Incheon Intl Airport to Illinois

Our best Air Canada deals on Incheon Intl Airport to Illinois flight tickets
Air Canada
Sep 17
ICN6:00 pmIncheon Intl
28h 00m
2 stops
ORD8:00 amChicago O'Hare Intl
Sep 24
ORD8:25 pmChicago O'Hare Intl
29h 50m
2 stops
ICN4:15 pmIncheon Intl
$606
Find similar
Air Canada
Oct 8
ICN6:00 pmIncheon Intl
39h 57m
1 stop
STL7:57 pmLambert-St Louis
Oct 15
STL4:05 pmLambert-St Louis
34h 10m
2 stops
ICN4:15 pmIncheon Intl
$669
Find similar
Air Canada
Oct 15
ICN6:00 pmIncheon Intl
31h 23m
1 stop
ORD11:23 amChicago O'Hare Intl
Nov 12
ORD1:10 pmChicago O'Hare Intl
37h 00m
1 stop
ICN5:10 pmIncheon Intl
$730
Find similar

American Airlines flights from Incheon Intl Airport to Illinois

Our best American Airlines deals on Incheon Intl Airport to Illinois flight tickets
American Airlines
Oct 22
ICN5:45 pmIncheon Intl
19h 57m
1 stop
ORD11:42 pmChicago O'Hare Intl
Oct 29
ORD5:00 amChicago O'Hare Intl
20h 55m
1 stop
ICN3:55 pmIncheon Intl
$587
Find similar
American Airlines
Oct 15
ICN5:45 pmIncheon Intl
25h 33m
2 stops
ORD5:18 amChicago O'Hare Intl
Oct 22
ORD10:34 pmChicago O'Hare Intl
26h 56m
2 stops
ICN3:30 pmIncheon Intl
$724
Find similar
American Airlines
Oct 16
ICN5:45 pmIncheon Intl
25h 29m
2 stops
ORD5:14 amChicago O'Hare Intl
Oct 23
ORD10:34 pmChicago O'Hare Intl
26h 56m
2 stops
ICN3:30 pmIncheon Intl
$726
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Incheon Intl Airport to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 10, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 10/22

5:45 pm-11:42 pm

1 stop19h 57m

Chicago O'Hare Intl

Wed 10/29

5:00 am-3:55 pm

1 stop20h 55m

$587

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Sat 10/25

8:35 pm-12:06 am

1 stop17h 31m

Chicago O'Hare Intl

Sat 11/1

8:00 am-6:35 pm

1 stop20h 35m

$667

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/8

6:00 pm-7:57 pm

1 stop39h 57m

Lambert-St Louis

Wed 10/15

4:05 pm-4:15 pm

2 stops34h 10m

$669

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/8

6:00 pm-3:18 pm

2 stops35h 18m

Lambert-St Louis

Wed 10/15

4:05 pm-4:15 pm

2 stops34h 10m

$730

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 2/12

6:00 pm-9:04 am

1 stop30h 04m

Lambert-St Louis

Mon 2/16

7:30 am-4:20 pm

1 stop17h 50m

$794

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 2/13

6:00 pm-6:04 pm

1 stop39h 04m

Lambert-St Louis

Mon 2/16

6:30 am-3:30 pm

1 stop18h 00m

$795

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Fri 2/6

12:45 pm-9:16 pm

2 stops23h 31m

Moline Quad-City

Tue 2/10

8:46 am-5:40 am

2 stops29h 54m

$973

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Fri 2/6

12:45 pm-9:36 pm

2 stops23h 51m

Moline Quad-City

Tue 2/10

10:47 am-5:40 am

2 stops27h 53m

$975

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Tue 9/23

10:15 am-12:28 pm

1 stop16h 13m

Chicago Midway

Tue 10/21

9:20 am-5:20 pm

1 stop18h 00m

$1,346

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Mon 10/6

10:15 am-12:28 pm

1 stop16h 13m

Chicago Midway

Mon 10/13

9:20 am-5:20 pm

1 stop18h 00m

$1,402

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Incheon Intl Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Incheon Intl Airport is in March. Flight prices, which tend to average around $990, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of March, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $1,143.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Incheon Intl Airport to Illinois is on a Tuesday when prices can be found for as low as $1,299. Flights from Incheon Intl Airport to Illinois on a Wednesday will generally be more expensive and average around $1,536. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Incheon Intl Airport to Illinois during this time can be as low as $1,098. Flights in the evening are often more expensive with an average ticket price of $1,995.

What is the cheapest Incheon Intl to Illinois flight route?

Fly from Incheon Intl to Chicago O'Hare Intl for the best Incheon Intl - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Incheon Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,310 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Incheon Intl Airport for as low as $1,031 on momondo.

What cabin class options are available on Incheon Intl to Illinois flights?

There are 4 cabin classes available to choose from on Incheon Intl to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Incheon Intl Airport to Illinois flights?

You could potentially save up to 9% on your flight if you consider stops on a Incheon Intl Airport to Illinois flight.

Cheap Incheon Intl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Incheon Intl Airport to Illinois

Best Price Found

$1,103

Fastest flight time

12h 50m

Direct flights

Every day

Airports in Illinois

1 airport
The best one-way flight to Illinois from Incheon Intl Airport in the past 72 hours is $1,103. The best round-trip flight deal from Incheon Intl Airport to Illinois found on momondo in the last 72 hours is $1,288.
The fastest flight from Incheon Intl Airport to Illinois takes 12h 50m
Direct flights go from Incheon Intl Airport to Illinois every day.
There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)
Search flight deals

  • When did momondo last update prices for flights from Incheon Intl Airport to Illinois?

    Prices for flights from Incheon Intl Airport to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Incheon Intl Airport to Illinois?

  • How old do you have to be to fly from Incheon Intl Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Incheon Intl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Incheon Intl Airport to Illinois?

Best airlines flying from Incheon Intl Airport to Illinois

Compare and see reviews for airlines that fly from Incheon Intl Airport to Illinois with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $229Free CancellationRating
7.9
7,963 reviews
Search Delta flights
Asiana AirlinesPriceFrom $558Free CancellationRating
8.2
481 reviews
Search Asiana Airlines flights
Air CanadaPriceFrom $730Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
American AirlinesPriceFrom $763Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Korean AirPriceFrom $857Free CancellationRating
8.4
1,140 reviews
Search Korean Air flights
United AirlinesPriceFrom $959Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seoul to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seoul to Illinois. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seoul to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Seoul which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seoul to Illinois?

Once all potential Seoul to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seoul to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Seoul. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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